Photoreactivities of Contact Charge-Transfer Complexes between 1, 1 Diarylethenes and Oxygen Molecules. Dimerization and Oxygenation Accelerated in Medium …

M Kojima, A Ishida, S Takamuku

Index: Kojima, Masanobu; Ishida, Akito; Takamuku, Setsuo Bulletin of the Chemical Society of Japan, 1998 , vol. 71, # 9 p. 2211 - 2220

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Citation Number: 15

Abstract

The selective excitation of contact charge-transfer (CCT) bands of 1, 1-diarylethenes [Ar= 4- MeOC 6 H 4 (1a); 4-MeC 6 H 4 (1b); Ph (1c)] with molecular oxygen in CH 2 Cl 2 and MeCN resulted in the formation of the corresponding 3, 3, 6, 6-tetraaryl-1, 2-dioxanes (2) as a primary product, together with diaryl ketones (3). The reaction mechanism and intermediates for the production of 2 and 3 were studied in terms of the effects of the solvent polarity, ...